* {
  margin: 0;
  padding: 0;
}
body {
  position: fixed;
  width: 100%;
  height: 100%!important;
  overflow: hidden;
}
body #webcam {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 100%;
}
body #webcam video {
  width: 100%;
  height: 100%;
}
body #webcam button {
  position: absolute;
  top: 0;
}
